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Vocal sensations and winners of season 3 of NBC's "The Sing-Off,"Pentatonixhave had a whirlwind week with their latest YouTube video – "Evolution Of Music" – garnering nearly5.5 millionin the 6 days since its debut. The video spans 1000 years of music in just 4 minutes, featuring some of the most popular songs from the last dozen centuries, and has been featured by The Huffington Post, Ryan Seacrest, Mashable and even got some radio love from New York City's Z100.

This follows the success of the group's previous offerings, Macklemore and Ryan Lewis' "Thrift Shop" which surpassed the six million-view mark, an *NSYNC medley and a Swedish House Mafia mash-up. All of the arrangements are performed on the group's current tour, which continues through May. The YouTube videos (and more) can be found on the Pentatonix YouTube channel:www.youtube.com/ptxofficial.

On top of their live performance and YouTube release schedules, Pentatonix are also arranging and recordingPTX Vol 2, planned for an early Summer release.

After winning the most recent season of NBC's "The Sing Off," Pentatonix enjoyed a whirlwind of success in 2012. They released 2 EP's –PTX Vol 1&PTXmas– twice debuting on Billboard's Top 200 and selling a combined 100,000 albums and counting. Their television appearances included The Tonight Show w/ Jay Leno, The Katie Couric Show, The Talk, The American Music Awards Red Carpet Show and VH1's Big Morning Buzz Live! They have been regularly featured by RyanSeacrest.com and Perez Hilton. The Philadelphia Inquirer reviewed their fall tour and said:

No strictly vocal act sounds more ecstatic in triumph than Pentatonix… Euphoric best describes the joyful, self-described "futuristic a cappella" quintet who played before a wildly enthusiastic Philly audience.

Pentatonix are taking instrument-free music far beyond anyone's wildest expectations. Named after the world's most widely recognized five-note musical scale, this vocal quintet has transformed one of pop music's purest and most soulful expressions into an exciting future, filled with limitless sonic possibility. Pairing their intricate arrangements with cleverly re-imagined pop songs, Pentatonix have quickly cultivated a sound and style that is entirely unique and undeniably infectious.

Just a year old, the Pentatonix YouTube channel boasts over70 millionviews, buoyed by more than700,000subscribers. The group also has more than290,000Facebook fans and nearly 85,000twitter followers.